When you dropped it, it probably broke something inside like a screw hole or a plastic tab or something. i would keep it in the back of your mind just in case something does happen but other than that theres not a whole lot you can do

I'll play the Devil's side... it would drive me nuts hearing something rattling around inside mine (like the rocks in my head ). I would be dying to know what it was. you could check out some of the vids on youtube showing how to remove the back cover & pop it off. I've opened mine up a couple times That's me though, I would not mind voiding the warranty so keep that in mind as that's 1 of the big risks you take. Otherwies let it rattle :smokingsomb:

Check along the edges of the plastic back for points that can be separated easily, chances are you may have broken off a little snap from the back plastic cover and its nothing to worry about. Also check the connector and earphone jack for damage.